Figure 7.  Bering Sea summer euphausiid backscatter at 120 kHz and walleye pollock backscatter at 38 kHz from the EIT 2004-09 surveys.  Age 3+ walleye pollock biomass estimated by the stock assessment model (SAFE Table 1.22, December 2009).  Each time series has been normalized to its value in 2004. The 2009 results are preliminary.